Biochemical analysis of TOPBP1 oligomerization.
Biochemical analysis of TOPBP1 oligomerization.
复制标题
DOI:
10.1016/j.dnarep.2020.102973
复制
发表时间:
2020-12
期刊:
影响因子:
3.8
通讯作者:
Michael WM
中科院分区:
文献类型:
--
作者:
Kim A;Montales K;Ruis K;Senebandith H;Gasparyan H;Cowan Q;Michael WM
TOPBP1 is an important scaffold protein that helps orchestrate the cellular response to DNA damage. Although it has been previously appreciated that TOPBP1 can form oligomers, how this occurs and the functional consequences for oligomerization were not yet known. Here, we use protein binding assays and other biochemical techniques to study how TOPBP1 self associates. TOPBP1 contains 9 copies of the BRCT domain, and we report that a subset of these BRCT domains interact with one another to drive oligomerization. An intact BRCT 2 domain is required for TOPBP1 oligomerization and we find that the BRCT1&2 region of TOPBP1 interacts with itself and with the BRCT4&5 pair. RAD9 and RHINO are two heterologous binding partners for TOPBP1’s BRCT 1&2 domains, and we show that binding of these partners does not come at the expense of TOPBP1 oligomerization. Furthermore, we show that a TOPBP1 oligomer can simultaneously interact with both RAD9 and RHINO. Lastly, we find that the oligomeric state necessary for TOPBP1 to activate the ATR protein kinase is likely to be a tetramer.
登录
查看更多内容
影响因子:
4.8
作者:
Du, LL;Moser, BA;Russell, P
通讯作者:
Russell, P
影响因子:
4.3
作者:
Lindsey-Boltz, Laura A.;Kemp, Michael G.;Sancar, Aziz
通讯作者:
Sancar, Aziz
DOI:
10.1126/science.1203430
发表时间:
2011-06-10
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Cotta-Ramusino C;McDonald ER 3rd;Hurov K;Sowa ME;Harper JW;Elledge SJ
通讯作者:
Elledge SJ
影响因子:
4.8
作者:
Gillespie, Peter J.;Gambus, Agnieszka;Blow, J. Julian
通讯作者:
Blow, J. Julian
影响因子:
4.5
作者:
Granata, Magda;Lazzaro, Federico;Muzi-Falconi, Marco
通讯作者:
Muzi-Falconi, Marco